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An exercise device for mounting to a chair, the device including a resistance means having a resilient means with a length. The resilient means is linked to first and second operating means at respective opposite ends of the resilient means, whereby movement of at least one of the first and second o

An exercise device for mounting to a chair, the device including a resistance means having a resilient means with a length. The resilient means is linked to first and second operating means at respective opposite ends of the resilient means, whereby movement of at least one of the first and second operating means permits exercise against the resilient means.

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The invention claimed is: 1. An exercise device for mounting to a chair, comprising: a chair mounting means for securing the exercise device to the chair; a first resistance means, including a resilient means having a length at rest; the resilient means being linked to a hand operating means and a

The invention claimed is: 1. An exercise device for mounting to a chair, comprising: a chair mounting means for securing the exercise device to the chair; a first resistance means, including a resilient means having a length at rest; the resilient means being linked to a hand operating means and a foot operating means, whereby movement of the hand operating means, the foot operating means or both permits exercise against the resilient means; wherein when the exercise device is secured to the chair, a resistance against extension of the resilient means by movement of the foot operating means by a given amount is greater than a resistance against extension of the resilient means by movement of the hand operating means by said given amount; and wherein an intermediate portion of the resilient means is looped around a plurality of spaced pulleys such that the hand operating means and the foot operating means are spaced by a distance that is less than a length of the resilient means when the resilient means is at rest. 2. The exercise device as claimed in claim 1, wherein the hand operating means and the foot operating means are adaptable, during exercise, to be spaced by a distance greater than said length at rest. 3. The exercise device according to claim 1, wherein at least one of the plurality of pulleys is associated with the foot operating means for movement therewith. 4. The exercise device according to claim 1, wherein respective opposite ends of the resilient means are linked to the hand operating means and a fixture. 5. The exercise device according to claim 1, wherein the device includes a second resistance means. 6. An exercise device for mounting to a chair, comprising: a chair mounting means for securing the exercise device to the chair; a first resistance means, including a resilient means having a length at rest; the resilient means being linked to a hand operating means and a foot operating means, whereby movement of the hand operating means, the foot operating means or both permits exercise against the resilient means; wherein when the exercise device is secured to the chair, a resistance against extension of the resilient means by movement of the foot operating means by a given amount is greater than a resistance against extension of the resilient means by movement of the hand operating means by said given amount; second resistance means; and wherein the foot operating means is connected to both resistance means and is adapted for use with both of the user's feet, whereby movement of the foot operating means is against both resistance means. 7. The exercise device according to claim 6, wherein the foot operating means is one of a bar, a rod and a tube. 8. The exercise device according to claim 6, wherein the foot operating means is an extendable footrest with two separate foot-receiving means adapted for relative slidable movement, whereby the two separate foot-receiving means are biased together by a third resistance means, such that movement of the two foot-receiving means permits exercise against the third resistance means. 9. The exercise device according to claim 8, wherein the slidable movement of the two foot-receiving means is coaxial with a support bar joining the two foot-receiving means. 10. The exercise device according to claim 1, wherein the chair-mounting means permits removable mounting of the device to the chair for portability. 11. The exercise device according to claim 1, wherein the device is adapted to be removably mounted on the chair and the chair is a standard office chair. 12. The exercise device according to claim 10, wherein the removable mounting means further includes a central mounting device and one or more arms extending from the central mounting device, and wherein each of the one or more arms supports a respective resistance means. 13. An exercise device for mounting to a chair, comprising: a chair mounting means for securing the exercise device to the chair; a first resistance means, including a resilient means having a length at rest; the resilient means being linked to a hand operating means and a foot operating means, whereby movement of the hand operating means, the foot operating means or both permits exercise against the resilient means; wherein when the exercise device is secured to the chair, a resistance against extension of the resilient means by movement of the foot operating means by a given amount is greater than a resistance against extension of the resilient means by movement of the hand operating means by said given amount; wherein the chair-mounting means permits removable mounting of the device to the chair for portability; wherein the removable mounting means further includes a central mounting device and one or more arms extending from the central mounting device, and wherein each of the one or more arms supports a respective resistance means; and wherein the central mounting device includes a clamp and wherein each of the one or more arms is pivotable about an axis coaxial with an axis of the clamp. 14. An exercise device for mounting to a chair, comprising: a chair mounting means for securing the exercise device to the chair; a first resistance means, including a resilient means having a length at rest; the resilient means being linked to a hand operating means and a foot operating means, whereby movement of the hand operating means, the foot operating means or both permits exercise against the resilient means; wherein when the exercise device is secured to the chair, a resistance against extension of the resilient means by movement of the foot operating means by a given amount is greater than a resistance against extension of the resilient means by movement of the hand operating means by said given amount; wherein the chair-mounting means permits removable mounting of the device to the chair for portability; wherein the removable mounting means further includes a central mounting device and one or more arms extending from the central mounting device, and wherein each of the one or more arms supports a respective resistance means; and wherein each of the one or more arms is pivotable between a first operating position and a second position wherein the resistance means extend rearwardly of the chair for out-of-the-way storage. 15. The exercise device according to claim 1, wherein the resilient means, at rest, is located within a housing. 16. The exercise device according to claim 1, wherein the hand operating means is a handle.